A large dense population or a small scattered population A small scattered population Two ways a population can decrease in size decreased birthrate and emigration Suppose that a species of ID: 679153
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Slide1
Which would be least likely to be affected by a density-dependent limiting factor?A large, dense population or a small, scattered population
A small, scattered populationSlide2
Two ways a population can decrease in size?decreased birthrate and emigrationSlide3
Suppose that a species of fish is introduced into a new environment in an attempt to reduce the population of insects. The fish has no natural predators in the new environment. The fish population would most likely
increase exponentially.Slide4
A disease resulting in the deaths of one third of a dense population of bats in a cave would be density-dependent limiting factor.Slide5
The pattern of spacing between individuals across the range of a population is itsdistribution.Slide6
Something that controls the growth or size of a population is a limiting factor.Slide7
How would you describe a population that is decreasing in size?The death rate is becoming higher than the birthrate.Slide8
The various growth phases through which most populations go are represented ona logistic growth curve.Slide9
If you know the range of a population, then you know the areas that are inhabited by the population.Slide10
During some kinds of population growth, the size of each generation of offspring is larger than the generation before it. So, as the population gets larger, it grows more quickly. This situation is calledexponential growth.Slide11
Demography is the scientific study ofhuman populations.Slide12
The movement of organisms into a range is calledimmigration.Slide13
If the death rate of a population is greater than the birthrate, the population decreasesSlide14
There are 150 Saguaro cactus plants per square kilometer in a 10-square-kilometer area of Arizona desert. To which population characteristic does this information refer?population densitySlide15
____________ __________limiting factors affect all populations, whether the population size is two or two hundred. Density-independentSlide16
When you graph a population’s exponential growth over time, you will have an _________ graph.J-shapedSlide17
___________ growth occurs when a population’s growth slows or stops, following a period of rapid growth.LogisticSlide18
The __________ model of population growth accounts for the influence of carrying capacity. logisticSlide19
An indication that a country has completed the demographic transition is a ____ birthrate and a _____death rate.Low, low Slide20
Emigration can cause a population to ____________________ in size.decreaseSlide21
Scientists who study human populations and predict the growth rate of the world and of individual countries study the science of ____________________.demographySlide22
A population of bacteria with an unlimited supply of nutrients will eventually show ____________________ growth.exponentialSlide23
If a population is undergoing logistic growth, it may have a growth rate near zero once the ____________________ has been reached.carrying capacitySlide24
Identify 3 limiting factors that depend on population density.Density-dependent limiting factors become limiting only when the population density—the number of organisms in a given area—reaches a certain level. These factors include competition, predation, parasitism, and disease.Slide25
Identify 3 limiting factors that do not depend on population density.Density-independent limiting factors affect all populations in similar ways, regardless of population size. These limiting factors include weather, natural disasters, and certain human activities, such as damming rivers and clear-cutting forests.Slide26
List the three patterns of distribution.Random, uniform, clumpedSlide27
List the four factors that affect population growth.birth ratedeath rateimmigrationemigrationSlide28
Compare and contrast the graph of exponential growth to the graph of logistic growth.The pattern of exponential growth is a J-shaped curve. The pattern of logistic growth is an S-shaped curve.Slide29
What will reduce competition within a species’ population?Fewer individuals